ARB Air Locker Differential Case Assembly

The ARB Air Locker differential case assembly is a pneumatically actuated selectable locking differential for 4x4 and off-road vehicles. It gives you an open differential for normal driving and can be locked on demand for maximum traction on rough terrain. It is also known as an air-operated locker, selectable locker, or locking differential.

Key Features:

• On-demand operation: the differential works as a standard open differential until you engage the locker with air pressure
• Locks both axle shafts together when engaged, sending equal power to both wheels for traction on loose, uneven, or slippery surfaces
• Air-actuated design controlled from the cabin, using an onboard ARB air compressor or another compatible air supply
• Precision-machined, heat-treated components built for heavy off-road use
• Replaces the factory differential case or carrier internals, so the axle housing and ring gear are retained
• Available in application-specific configurations to suit a range of axle assemblies

ARB is an Australian maker of 4x4 equipment. Its Air Locker is a widely used locking differential for overlanding, rock crawling, expedition, and recreational off-road use. Installation requires proper differential setup, including correct gear backlash and pattern. Professional installation is recommended.